in a couple days our wlan authentication system goes online for a beta run.
it consists of a wifi authentication system called wifidog. It is developed as open source software by canadians.
normally anyone can use it. You can logon to the hotspot without any wpa key, register at the login page and surf for free. This didn’t fit our needs because we installed it for restriced access for the customers.
Still our customers login with a wpa key. Now they will login to an open network and can only browse one site: the loginpage for authentication. Afterwards we are able to trac the time they were online nothing more.
With wifidog its really easy to disable the registration form and the email validation procedure.
The only thing which wasn’t so easy is to disable access for a resistered user.I had to write a little pgsql script which takes the username and sets the account_status of the users table to zero which stands for denied; 1 is for allowed.
I put the authentication server and the gateway server on one fedora mashine. Hopefully someday i will put the gateway on our Linksys WRT54G but its always used and people would complain about the connection interruption 
well someday we get anotherone.
There is something which i don’t really understand about the system. When i login as a wifi user than there are some dalays when i try to login or logout, but well it works anyway. Sometimes its confusing for the customers.
hi, im trying to to do something similar to your setup, could you share the pgsql script if it’s ok with you.
and i don’t remember the script, sorry … this is more than a year ago
again try coovachilli
i don’t not use wifidog anymore because of several reasons, try coovachilli here: https://help.ubuntu.com/community/WifiDocs/CoovaChilli